Chuck device



sept. 16, 1930.

G.` W. EMRICK CHUCK DEVICE Filed OCT.. 14, 1927 a .,1 z z ,m 2 3 f M 2 a Z ,d 7 7/ V 2 7 Z 7 no Z i f 3 EMM N d m W f /p v ww f 2 m. f O w 5 f m 2 9 1 mw. 2 e z @afge Zi ATTO EY Patented Sept. 16, 1930 y nire s'rrss PATENT FFICE Yenr-)neas W. EMBIOK, or BROOKLYN, NEW YORK, Assrsnora, BY Masiva To BTTCO Toor. co. ino., or BROOKLYN, new YORK, a celeron-Aaron ASSIGNMENTS, l? NEW YORK CHUCK DEVICE Application filed ctober 14, 1927.

This invention relates to chuck devices for use in connection with drilling tapping and similar machines; and the object of the invention is to provide a chuck device of the class described with two sets or series oijaws for movement into engagement with a tool inserted into the chuck, for example, a tap or drill, 4so that cach series of jaw members will engage the shank of the tool independently to irmly support and retain the tool in connection therewith, one series of jaw members serving to center the tool in the chuck device and the other toforcibly engage the tool to prevent turning or other movement of the 'tool :in the chuck; a further object being to provide -a chuck device, the body portion oi' which is open at one or two sides to give ten sion to one series of the jaw member thereof, whereby the engagement of said jaw inem- -bers with the Vshank of the tool may be seen primarily; for the purpose of properly ing the square or angular end of the shank of the tool; a further object being to provide a chuck device wherein one series of jaw inem- -bers is in the 'form of tapered wedge jaws movable *radiallyV and longitudinally of the Aaxis of the tool, and the other series of jaws being movable radially with reference to the tool, and` consists of a feed screw having leit and right hand threaded ends for feeding jaw members in threaded engagement with said screw toward and away from the shank 'of the tool; and with these and other objects in view, the invention c-onsists in a device of the class and for the purpose specified, which is simple in construction, eiicient in use and which is constructed as hereinafter described and claimed.

Vrlhe invention is fully disclosed in the ollowing specification, of which the accompanying drawing `forms a part, in which the sep arate part-s of my improvement are designatedbysuitable reference characters in each of the views, and in which f, Fig. 1 is a secti-onal view through a chuck device made according to'my invention and illustrating the method of its use.

Fig.'2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 1.

Serial Ilo. 226,077.

Fig. l is a section on the line 1 -fl or" Fig. 1; and,

Fig. 5 is a side and sectional View, similar to F ig. 2 but showing a modiiication.

ln practice, I provide a chuck body or casing 10, the upper end of which is provided with a threaded borc- 11 arranged vertically therein as seen in the accompanying drawing to permit of the mounting' of the body l0 in connection with a spindle of a tapping, drilling or other machine. At 12, l have shown apertures in the 'side walls of the body to receive a Spanner or similar wrench to iacilitatethe mounting of the chuck body in connection with the machine spindle.

The body 10 isv provided with a transverse bore or passage 18 opening through opposite sides thereof, as clearly seen in Figs. 1 and 3, and the threaded bore 11 extends into the bore 13, and another bore 14 transverses the body 10 at right angles to the bore 13. The lower end of the body 10 is externally threaded as seen at 15 to receive a cup-shaped nut 16, the bottom flange 17 of which is adapted to operate in connection with wedge-shaped jaws 18, three of which are employed in the construction shown, said jaws having beveled outer faces 18a for i engagement with the beveled faces or conical formation of a bore 19 in the lower end of the body 10 to move the jaw members 18 longitudinally' and radially with respect to the axis of the body 10 in the adjustment of the cap nut 16. The jaw members 18 are normally held in spaced relation in the bore 19 by springs 2O operating in sockets 181 in the adjacent :tacos of the jaws 18 as seen in Fig. s of the drawing. T he cupshaped nut 16 is held against displacement from the body 10 by a spring ring 16L as clearly seen in Figs. 1 and 2 of the drawing.

rlhe jaw members 18 constitute one unit jaw construction, and another unit jaw construction consisting of two radially movable jaws 21 and 22 is mounted in the transverse bore 14. Arranged eccentrically of the jaws 21 and 22 are threaded bores 21a, 22a, one bore having a left hand thread and the other a right hand thread to engage correspondingly threaded portions 23 and 24 on a feed screw 25, the central portion of which is reduced.

V.feediscrew 25 Vas clearly.- seen in Figs'. 1

' construction, it will beapparent that the jaws One/sideof this screw, the'sideiprovided with.v

i 2 of the drawing. By means of this key, the

screw '25` may be rotated to move the jaws `'21 and 22upwardly 4or outwardly with respect to the axis of the body 41() or .with *re spect to'theshank of. a tapping or -other tool. t y 27 ,and especially lthe squared end 2.74 thereof.

virtue of. the eccentric arrangement "of jV thel'bores 21av and 22a in the jaws 21'and 22,; said jaws ,are retainedvagainst rotation in l j ".thebore 14, especially. by virtueo aiy'oke- V'shaped-key or retaining member 28 arranged to partlyencircle the reduced portion of the and2 and` said key 28` is provided with an angular extension y2,Swhich'enters the bore Hiy.

11. The key 28 alsofretains the unitjjawr construction,consistingfotthe jaws 21 and. :22, efromV laterall displacement in the bodyA `10. r.pI-lowev'er, inv assembling` the device, the key28 is placedupon'the screw 25, and said parts as assembled,jplaced in the bore14t, after whichthej aws; 21 andV 22 are mounted onthe outer ends of the feed screw,and"by"r'o tatingsaid screw theaws will be fed inwardingfot'the jaws will dissect the parts as will Ybe apparent, The aws V18' may 'be removed by removingthe springgringV 16a, vIn Fg. 5` oftheldrawin'g, I slight modification or" the'constructionlshown y'inF'igsL lv to-L inclusive, wherein the jaws 21 and 22 are provided withrough'ened grip'-V p'ing ksurfaces 29 and 30 respectively, instead of with plain surfaces y'asfseen Vin the, other i'igures to adaptfthe device for usein connec# tion with tools, such as drills 31 having round.

or unsquared orangnlar shank's.`V VWith this Y v-21 and 22vincombination withtliejaws 18 willsecurelyfretainthetool 31 in connection with thedevice, and prevent, -at least toa greater degree, the possibility of lrotation of the drill or-other tool in the chuck. `f 'Y In both forms of constructiomthe bore 1 which if desired may open through "one side e j only of thebody 10,1permits the operator lto properlyset the jaws 21- and 22 on the angular *shank 27? of a tapping or other tool ;v that is Y to say, to properly aline thetopposite squared vsides oftheshank withithe flat faces of said lthetapping or other tool in connectionwith the chuck, it is-iirsty centered 'inthe body l0 by the engagementQwithl the' jaws-18 there!l Y r`with, after whichjthe jaws21 andV V 22 are l Visi),

moved into .firm engagement with theshank by'the'useoftthe key or other tool 26. In adv v .dition topreventingthe rotation of thetool .inthe chuck body,-the jaws-21 and 22lvalso 'In the samelmanner, the outward'feedjaws It will be understood that in mounting" to the'chu'ck bodyI and arranged in'said bore* 'aria taptttting'tuthtttiti feed lSeitegttpfk t er L :vent `movementiof the screw in` its ,y

aeg-tee, tint/passait tilting tt the tooi inthe operation thereof. t

It willY be understood Vwhilev I'v vhave l showncertain details of constructionffor car- Y' rying-my invention into effectand 'havefillusscope of'thefappended'claimswithout'depart-4 ingtfrom the spirit 'of my invention'or sacri'.-

'ficing'its advantages. z

(Having'f I claim as new and Patent, ist;

desire to secureby Letters 1. vrtoliucl kdevice comprising abodypori` i transversely -through theaX-is thereof, two cylindricalj ws mounted toiit snugly inthe opposite'end4 portions osai'dbore'and free centric to the aXis of saidjaws, a ifeed screw s having left andv right handthreaded end'porf.hk A ytions in threaded ,engagementwiththebores ofV saidi jaws land arranged:entirelywithin f l i rk,the peripheral boundaiesoffsaid jaws',gmea`ns wherebyisaid;feed-'screw maybe rotated to t' A v toty f withinthe:cylindricalboreofthebooly'fpor-` move said jaws toward and from-@eachother 'tion havingla vcylindrical .bore extending tion of thechuckQthe centralportionloffsaidj` i the feed screwto prevent movementvofth'e A screwfin its. p athof rey'olution;

centric tothe axis 'of said jaws," a feed'screw having left-.and-right handthreaded endV portions"inthreaded"engagement with the" boresvofsaid jaws-andarrange'd :entirely j within Y the t peripheral -boundales t off. said :fee-da Screw rbeing unthreadedt, andqai yoke: f ,Y shaped -m0untedfwithin1the ,Cylvidrwlj, .j bore ofthe chuck Abody and the yoke. of ,which sei-o n partlyv encircles the* unt-h readedportion'of7;, A

jaws, means wherebysaid feed screw maybe rotated to move said' jawstoward andfroin Y each other within the cylindrical bore of the body portion ofthe chuck,andrmeans keyed .y

revolution. Y y t 3. A chuck device'co i o ,pfisitg'tbofiy-1pf-1* tion havingv a cylindricalgbre extending v transversely through the faXis "thereof, two

cylindrical' jawsmounted to iit snugly inthe d its eccentric to the axis of said jaws, a feed screw having left and right hand threaded end portions in threaded engagement with the bores of said jaws and arranged entirely Within the peripheral boundaries of said aws, means whereby said feed screw may be rotated to move said jaws toward and from each other within the cylindrical bore of the body portion of the chuck, and means keyed to the chuck body and arranged in said bore and cooperating with said feed screw to prevent movement of the screw in its path of revolution, and said chuck body having a transverse lpassage `extending therethrough at right angles and in intersecting relation to said bore, said passage opening outwardly through opposite sides of said chuck body whereby the relative position of the adjacent faces of the jaws in the chuck body may be seen through either side of said body.

In testimony that I claim the foregoing as my invention I have signed my name this 6th day of October, 1927.

GEORGE W. EMRICK. 

